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Essay text:
All air bubbles were removed and the valve was checked that it was close.
2) The level NaOH was recorded as the initial reading.
3) Using the pipette, 10cm3 of Sulphuric acid (H2SO4) was added into the flask.
4) 3 drops of Bromothymol blue indictor was then added to the flask.
5) The NaOH was carefully added drop wise until the indictor changed colour (from colourless to pink).
6) The final volume was then recorded.
7) This was then repeated 3 times.
8) The concentration of NaOH was then calculated.
9) One the concentration was found, using the pipette (washed first with distilled water) 10cm3 of NaOH was then added to the flask (also washed with distilled water)...
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